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IB: Modify ib_create_mr API
[deliverable/linux.git] / drivers / infiniband / core / verbs.c
CommitLineData
1da177e4
LT		 1/*
2 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2004 Infinicon Corporation. All rights reserved.
4 * Copyright (c) 2004 Intel Corporation. All rights reserved.
5 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
6 * Copyright (c) 2004 Voltaire Corporation. All rights reserved.
2a1d9b7f 7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
33b9b3ee 8 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
1da177e4
LT		 9 *
10 * This software is available to you under a choice of one of two
11 * licenses. You may choose to be licensed under the terms of the GNU
12 * General Public License (GPL) Version 2, available from the file
13 * COPYING in the main directory of this source tree, or the
14 * OpenIB.org BSD license below:
15 *
16 * Redistribution and use in source and binary forms, with or
17 * without modification, are permitted provided that the following
18 * conditions are met:
19 *
20 * - Redistributions of source code must retain the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer.
23 *
24 * - Redistributions in binary form must reproduce the above
25 * copyright notice, this list of conditions and the following
26 * disclaimer in the documentation and/or other materials
27 * provided with the distribution.
28 *
29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 * SOFTWARE.
1da177e4
LT		 37 */
38
39#include <linux/errno.h>
40#include <linux/err.h>
b108d976 41#include <linux/export.h>
8c65b4a6 42#include <linux/string.h>
0e0ec7e0 43#include <linux/slab.h>
1da177e4 44
a4d61e84
RD		 45#include <rdma/ib_verbs.h>
46#include <rdma/ib_cache.h>
dd5f03be 47#include <rdma/ib_addr.h>
1da177e4 48
ed4c54e5 49#include "core_priv.h"
1da177e4 50
2b1b5b60
SG		 51static const char * const ib_events[] = {
52 [IB_EVENT_CQ_ERR] = "CQ error",
53 [IB_EVENT_QP_FATAL] = "QP fatal error",
54 [IB_EVENT_QP_REQ_ERR] = "QP request error",
55 [IB_EVENT_QP_ACCESS_ERR] = "QP access error",
56 [IB_EVENT_COMM_EST] = "communication established",
57 [IB_EVENT_SQ_DRAINED] = "send queue drained",
58 [IB_EVENT_PATH_MIG] = "path migration successful",
59 [IB_EVENT_PATH_MIG_ERR] = "path migration error",
60 [IB_EVENT_DEVICE_FATAL] = "device fatal error",
61 [IB_EVENT_PORT_ACTIVE] = "port active",
62 [IB_EVENT_PORT_ERR] = "port error",
63 [IB_EVENT_LID_CHANGE] = "LID change",
64 [IB_EVENT_PKEY_CHANGE] = "P_key change",
65 [IB_EVENT_SM_CHANGE] = "SM change",
66 [IB_EVENT_SRQ_ERR] = "SRQ error",
67 [IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached",
68 [IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached",
69 [IB_EVENT_CLIENT_REREGISTER] = "client reregister",
70 [IB_EVENT_GID_CHANGE] = "GID changed",
71};
72
73const char *ib_event_msg(enum ib_event_type event)
74{
75 size_t index = event;
76
77 return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ?
78 ib_events[index] : "unrecognized event";
79}
80EXPORT_SYMBOL(ib_event_msg);
81
82static const char * const wc_statuses[] = {
83 [IB_WC_SUCCESS] = "success",
84 [IB_WC_LOC_LEN_ERR] = "local length error",
85 [IB_WC_LOC_QP_OP_ERR] = "local QP operation error",
86 [IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error",
87 [IB_WC_LOC_PROT_ERR] = "local protection error",
88 [IB_WC_WR_FLUSH_ERR] = "WR flushed",
89 [IB_WC_MW_BIND_ERR] = "memory management operation error",
90 [IB_WC_BAD_RESP_ERR] = "bad response error",
91 [IB_WC_LOC_ACCESS_ERR] = "local access error",
92 [IB_WC_REM_INV_REQ_ERR] = "invalid request error",
93 [IB_WC_REM_ACCESS_ERR] = "remote access error",
94 [IB_WC_REM_OP_ERR] = "remote operation error",
95 [IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded",
96 [IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded",
97 [IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error",
98 [IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request",
99 [IB_WC_REM_ABORT_ERR] = "operation aborted",
100 [IB_WC_INV_EECN_ERR] = "invalid EE context number",
101 [IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state",
102 [IB_WC_FATAL_ERR] = "fatal error",
103 [IB_WC_RESP_TIMEOUT_ERR] = "response timeout error",
104 [IB_WC_GENERAL_ERR] = "general error",
105};
106
107const char *ib_wc_status_msg(enum ib_wc_status status)
108{
109 size_t index = status;
110
111 return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ?
112 wc_statuses[index] : "unrecognized status";
113}
114EXPORT_SYMBOL(ib_wc_status_msg);
115
8385fd84 116__attribute_const__ int ib_rate_to_mult(enum ib_rate rate)
bf6a9e31
JM		 117{
118 switch (rate) {
119 case IB_RATE_2_5_GBPS: return 1;
120 case IB_RATE_5_GBPS: return 2;
121 case IB_RATE_10_GBPS: return 4;
122 case IB_RATE_20_GBPS: return 8;
123 case IB_RATE_30_GBPS: return 12;
124 case IB_RATE_40_GBPS: return 16;
125 case IB_RATE_60_GBPS: return 24;
126 case IB_RATE_80_GBPS: return 32;
127 case IB_RATE_120_GBPS: return 48;
128 default: return -1;
129 }
130}
131EXPORT_SYMBOL(ib_rate_to_mult);
132
8385fd84 133__attribute_const__ enum ib_rate mult_to_ib_rate(int mult)
bf6a9e31
JM		 134{
135 switch (mult) {
136 case 1: return IB_RATE_2_5_GBPS;
137 case 2: return IB_RATE_5_GBPS;
138 case 4: return IB_RATE_10_GBPS;
139 case 8: return IB_RATE_20_GBPS;
140 case 12: return IB_RATE_30_GBPS;
141 case 16: return IB_RATE_40_GBPS;
142 case 24: return IB_RATE_60_GBPS;
143 case 32: return IB_RATE_80_GBPS;
144 case 48: return IB_RATE_120_GBPS;
145 default: return IB_RATE_PORT_CURRENT;
146 }
147}
148EXPORT_SYMBOL(mult_to_ib_rate);
149
8385fd84 150__attribute_const__ int ib_rate_to_mbps(enum ib_rate rate)
71eeba16
MA		 151{
152 switch (rate) {
153 case IB_RATE_2_5_GBPS: return 2500;
154 case IB_RATE_5_GBPS: return 5000;
155 case IB_RATE_10_GBPS: return 10000;
156 case IB_RATE_20_GBPS: return 20000;
157 case IB_RATE_30_GBPS: return 30000;
158 case IB_RATE_40_GBPS: return 40000;
159 case IB_RATE_60_GBPS: return 60000;
160 case IB_RATE_80_GBPS: return 80000;
161 case IB_RATE_120_GBPS: return 120000;
162 case IB_RATE_14_GBPS: return 14062;
163 case IB_RATE_56_GBPS: return 56250;
164 case IB_RATE_112_GBPS: return 112500;
165 case IB_RATE_168_GBPS: return 168750;
166 case IB_RATE_25_GBPS: return 25781;
167 case IB_RATE_100_GBPS: return 103125;
168 case IB_RATE_200_GBPS: return 206250;
169 case IB_RATE_300_GBPS: return 309375;
170 default: return -1;
171 }
172}
173EXPORT_SYMBOL(ib_rate_to_mbps);
174
8385fd84 175__attribute_const__ enum rdma_transport_type
07ebafba
TT		 176rdma_node_get_transport(enum rdma_node_type node_type)
177{
178 switch (node_type) {
179 case RDMA_NODE_IB_CA:
180 case RDMA_NODE_IB_SWITCH:
181 case RDMA_NODE_IB_ROUTER:
182 return RDMA_TRANSPORT_IB;
183 case RDMA_NODE_RNIC:
184 return RDMA_TRANSPORT_IWARP;
180771a3 185 case RDMA_NODE_USNIC:
5db5765e
UM		 186 return RDMA_TRANSPORT_USNIC;
187 case RDMA_NODE_USNIC_UDP:
248567f7 188 return RDMA_TRANSPORT_USNIC_UDP;
07ebafba
TT		 189 default:
190 BUG();
191 return 0;
192 }
193}
194EXPORT_SYMBOL(rdma_node_get_transport);
195
a3f5adaf
EC		 196enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
197{
198 if (device->get_link_layer)
199 return device->get_link_layer(device, port_num);
200
201 switch (rdma_node_get_transport(device->node_type)) {
202 case RDMA_TRANSPORT_IB:
203 return IB_LINK_LAYER_INFINIBAND;
204 case RDMA_TRANSPORT_IWARP:
180771a3 205 case RDMA_TRANSPORT_USNIC:
248567f7 206 case RDMA_TRANSPORT_USNIC_UDP:
a3f5adaf
EC		 207 return IB_LINK_LAYER_ETHERNET;
208 default:
209 return IB_LINK_LAYER_UNSPECIFIED;
210 }
211}
212EXPORT_SYMBOL(rdma_port_get_link_layer);
213
1da177e4
LT		 214/* Protection domains */
215
216struct ib_pd *ib_alloc_pd(struct ib_device *device)
217{
218 struct ib_pd *pd;
219
b5e81bf5 220 pd = device->alloc_pd(device, NULL, NULL);
1da177e4
LT		 221
222 if (!IS_ERR(pd)) {
b5e81bf5
RD		 223 pd->device = device;
224 pd->uobject = NULL;
1da177e4
LT		 225 atomic_set(&pd->usecnt, 0);
226 }
227
228 return pd;
229}
230EXPORT_SYMBOL(ib_alloc_pd);
231
232int ib_dealloc_pd(struct ib_pd *pd)
233{
234 if (atomic_read(&pd->usecnt))
235 return -EBUSY;
236
237 return pd->device->dealloc_pd(pd);
238}
239EXPORT_SYMBOL(ib_dealloc_pd);
240
241/* Address handles */
242
243struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
244{
245 struct ib_ah *ah;
246
247 ah = pd->device->create_ah(pd, ah_attr);
248
249 if (!IS_ERR(ah)) {
b5e81bf5
RD		 250 ah->device = pd->device;
251 ah->pd = pd;
252 ah->uobject = NULL;
1da177e4
LT		 253 atomic_inc(&pd->usecnt);
254 }
255
256 return ah;
257}
258EXPORT_SYMBOL(ib_create_ah);
259
73cdaaee
IW		 260int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
261 const struct ib_wc *wc, const struct ib_grh *grh,
262 struct ib_ah_attr *ah_attr)
513789ed 263{
513789ed
HR		 264 u32 flow_class;
265 u16 gid_index;
266 int ret;
267
4e00d694 268 memset(ah_attr, 0, sizeof *ah_attr);
227128fc 269 if (rdma_cap_eth_ah(device, port_num)) {
dd5f03be
MB		 270 if (!(wc->wc_flags & IB_WC_GRH))
271 return -EPROTOTYPE;
272
273 if (wc->wc_flags & IB_WC_WITH_SMAC &&
274 wc->wc_flags & IB_WC_WITH_VLAN) {
275 memcpy(ah_attr->dmac, wc->smac, ETH_ALEN);
276 ah_attr->vlan_id = wc->vlan_id;
277 } else {
278 ret = rdma_addr_find_dmac_by_grh(&grh->dgid, &grh->sgid,
279 ah_attr->dmac, &ah_attr->vlan_id);
280 if (ret)
281 return ret;
282 }
283 } else {
284 ah_attr->vlan_id = 0xffff;
285 }
286
4e00d694
SH		 287 ah_attr->dlid = wc->slid;
288 ah_attr->sl = wc->sl;
289 ah_attr->src_path_bits = wc->dlid_path_bits;
290 ah_attr->port_num = port_num;
513789ed
HR		 291
292 if (wc->wc_flags & IB_WC_GRH) {
4e00d694
SH		 293 ah_attr->ah_flags = IB_AH_GRH;
294 ah_attr->grh.dgid = grh->sgid;
513789ed 295
4e00d694 296 ret = ib_find_cached_gid(device, &grh->dgid, &port_num,
513789ed
HR		 297 &gid_index);
298 if (ret)
4e00d694 299 return ret;
513789ed 300
4e00d694 301 ah_attr->grh.sgid_index = (u8) gid_index;
497677ab 302 flow_class = be32_to_cpu(grh->version_tclass_flow);
4e00d694 303 ah_attr->grh.flow_label = flow_class & 0xFFFFF;
47645d8d 304 ah_attr->grh.hop_limit = 0xFF;
4e00d694 305 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
513789ed 306 }
4e00d694
SH		 307 return 0;
308}
309EXPORT_SYMBOL(ib_init_ah_from_wc);
310
73cdaaee
IW		 311struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
312 const struct ib_grh *grh, u8 port_num)
4e00d694
SH		 313{
314 struct ib_ah_attr ah_attr;
315 int ret;
316
317 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
318 if (ret)
319 return ERR_PTR(ret);
513789ed
HR		 320
321 return ib_create_ah(pd, &ah_attr);
322}
323EXPORT_SYMBOL(ib_create_ah_from_wc);
324
1da177e4
LT		 325int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
326{
327 return ah->device->modify_ah ?
328 ah->device->modify_ah(ah, ah_attr) :
329 -ENOSYS;
330}
331EXPORT_SYMBOL(ib_modify_ah);
332
333int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
334{
335 return ah->device->query_ah ?
336 ah->device->query_ah(ah, ah_attr) :
337 -ENOSYS;
338}
339EXPORT_SYMBOL(ib_query_ah);
340
341int ib_destroy_ah(struct ib_ah *ah)
342{
343 struct ib_pd *pd;
344 int ret;
345
346 pd = ah->pd;
347 ret = ah->device->destroy_ah(ah);
348 if (!ret)
349 atomic_dec(&pd->usecnt);
350
351 return ret;
352}
353EXPORT_SYMBOL(ib_destroy_ah);
354
d41fcc67
RD		 355/* Shared receive queues */
356
357struct ib_srq *ib_create_srq(struct ib_pd *pd,
358 struct ib_srq_init_attr *srq_init_attr)
359{
360 struct ib_srq *srq;
361
362 if (!pd->device->create_srq)
363 return ERR_PTR(-ENOSYS);
364
365 srq = pd->device->create_srq(pd, srq_init_attr, NULL);
366
367 if (!IS_ERR(srq)) {
368 srq->device = pd->device;
369 srq->pd = pd;
370 srq->uobject = NULL;
371 srq->event_handler = srq_init_attr->event_handler;
372 srq->srq_context = srq_init_attr->srq_context;
96104eda 373 srq->srq_type = srq_init_attr->srq_type;
418d5130
SH		 374 if (srq->srq_type == IB_SRQT_XRC) {
375 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
376 srq->ext.xrc.cq = srq_init_attr->ext.xrc.cq;
377 atomic_inc(&srq->ext.xrc.xrcd->usecnt);
378 atomic_inc(&srq->ext.xrc.cq->usecnt);
379 }
d41fcc67
RD		 380 atomic_inc(&pd->usecnt);
381 atomic_set(&srq->usecnt, 0);
382 }
383
384 return srq;
385}
386EXPORT_SYMBOL(ib_create_srq);
387
388int ib_modify_srq(struct ib_srq *srq,
389 struct ib_srq_attr *srq_attr,
390 enum ib_srq_attr_mask srq_attr_mask)
391{
7ce5eacb
DB		 392 return srq->device->modify_srq ?
393 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
394 -ENOSYS;
d41fcc67
RD		 395}
396EXPORT_SYMBOL(ib_modify_srq);
397
398int ib_query_srq(struct ib_srq *srq,
399 struct ib_srq_attr *srq_attr)
400{
401 return srq->device->query_srq ?
402 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
403}
404EXPORT_SYMBOL(ib_query_srq);
405
406int ib_destroy_srq(struct ib_srq *srq)
407{
408 struct ib_pd *pd;
418d5130
SH		 409 enum ib_srq_type srq_type;
410 struct ib_xrcd *uninitialized_var(xrcd);
411 struct ib_cq *uninitialized_var(cq);
d41fcc67
RD		 412 int ret;
413
414 if (atomic_read(&srq->usecnt))
415 return -EBUSY;
416
417 pd = srq->pd;
418d5130
SH		 418 srq_type = srq->srq_type;
419 if (srq_type == IB_SRQT_XRC) {
420 xrcd = srq->ext.xrc.xrcd;
421 cq = srq->ext.xrc.cq;
422 }
d41fcc67
RD		 423
424 ret = srq->device->destroy_srq(srq);
418d5130 425 if (!ret) {
d41fcc67 426 atomic_dec(&pd->usecnt);
418d5130
SH		 427 if (srq_type == IB_SRQT_XRC) {
428 atomic_dec(&xrcd->usecnt);
429 atomic_dec(&cq->usecnt);
430 }
431 }
d41fcc67
RD		 432
433 return ret;
434}
435EXPORT_SYMBOL(ib_destroy_srq);
436
1da177e4
LT		 437/* Queue pairs */
438
0e0ec7e0
SH		 439static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
440{
441 struct ib_qp *qp = context;
73c40c61 442 unsigned long flags;
0e0ec7e0 443
73c40c61 444 spin_lock_irqsave(&qp->device->event_handler_lock, flags);
0e0ec7e0 445 list_for_each_entry(event->element.qp, &qp->open_list, open_list)
eec9e29f
SP		 446 if (event->element.qp->event_handler)
447 event->element.qp->event_handler(event, event->element.qp->qp_context);
73c40c61 448 spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
0e0ec7e0
SH		 449}
450
d3d72d90
SH		 451static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
452{
453 mutex_lock(&xrcd->tgt_qp_mutex);
454 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
455 mutex_unlock(&xrcd->tgt_qp_mutex);
456}
457
0e0ec7e0
SH		 458static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
459 void (*event_handler)(struct ib_event *, void *),
460 void *qp_context)
d3d72d90 461{
0e0ec7e0
SH		 462 struct ib_qp *qp;
463 unsigned long flags;
464
465 qp = kzalloc(sizeof *qp, GFP_KERNEL);
466 if (!qp)
467 return ERR_PTR(-ENOMEM);
468
469 qp->real_qp = real_qp;
470 atomic_inc(&real_qp->usecnt);
471 qp->device = real_qp->device;
472 qp->event_handler = event_handler;
473 qp->qp_context = qp_context;
474 qp->qp_num = real_qp->qp_num;
475 qp->qp_type = real_qp->qp_type;
476
477 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
478 list_add(&qp->open_list, &real_qp->open_list);
479 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
480
481 return qp;
482}
483
484struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
485 struct ib_qp_open_attr *qp_open_attr)
486{
487 struct ib_qp *qp, *real_qp;
488
489 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
490 return ERR_PTR(-EINVAL);
491
492 qp = ERR_PTR(-EINVAL);
d3d72d90 493 mutex_lock(&xrcd->tgt_qp_mutex);
0e0ec7e0
SH		 494 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
495 if (real_qp->qp_num == qp_open_attr->qp_num) {
496 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
497 qp_open_attr->qp_context);
498 break;
499 }
500 }
d3d72d90 501 mutex_unlock(&xrcd->tgt_qp_mutex);
0e0ec7e0 502 return qp;
d3d72d90 503}
0e0ec7e0 504EXPORT_SYMBOL(ib_open_qp);
d3d72d90 505
1da177e4
LT		 506struct ib_qp *ib_create_qp(struct ib_pd *pd,
507 struct ib_qp_init_attr *qp_init_attr)
508{
0e0ec7e0 509 struct ib_qp *qp, *real_qp;
b42b63cf 510 struct ib_device *device;
1da177e4 511
b42b63cf
SH		 512 device = pd ? pd->device : qp_init_attr->xrcd->device;
513 qp = device->create_qp(pd, qp_init_attr, NULL);
1da177e4
LT		 514
515 if (!IS_ERR(qp)) {
0e0ec7e0
SH		 516 qp->device = device;
517 qp->real_qp = qp;
518 qp->uobject = NULL;
519 qp->qp_type = qp_init_attr->qp_type;
b42b63cf 520
e47e321a 521 atomic_set(&qp->usecnt, 0);
b42b63cf 522 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
0e0ec7e0
SH		 523 qp->event_handler = __ib_shared_qp_event_handler;
524 qp->qp_context = qp;
b42b63cf
SH		 525 qp->pd = NULL;
526 qp->send_cq = qp->recv_cq = NULL;
527 qp->srq = NULL;
528 qp->xrcd = qp_init_attr->xrcd;
529 atomic_inc(&qp_init_attr->xrcd->usecnt);
0e0ec7e0 530 INIT_LIST_HEAD(&qp->open_list);
0e0ec7e0
SH		 531
532 real_qp = qp;
533 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
534 qp_init_attr->qp_context);
535 if (!IS_ERR(qp))
536 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
537 else
538 real_qp->device->destroy_qp(real_qp);
b42b63cf 539 } else {
0e0ec7e0
SH		 540 qp->event_handler = qp_init_attr->event_handler;
541 qp->qp_context = qp_init_attr->qp_context;
b42b63cf
SH		 542 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
543 qp->recv_cq = NULL;
544 qp->srq = NULL;
545 } else {
546 qp->recv_cq = qp_init_attr->recv_cq;
547 atomic_inc(&qp_init_attr->recv_cq->usecnt);
548 qp->srq = qp_init_attr->srq;
549 if (qp->srq)
550 atomic_inc(&qp_init_attr->srq->usecnt);
551 }
552
553 qp->pd = pd;
554 qp->send_cq = qp_init_attr->send_cq;
555 qp->xrcd = NULL;
556
557 atomic_inc(&pd->usecnt);
558 atomic_inc(&qp_init_attr->send_cq->usecnt);
559 }
1da177e4
LT		 560 }
561
562 return qp;
563}
564EXPORT_SYMBOL(ib_create_qp);
565
8a51866f
RD		 566static const struct {
567 int valid;
b42b63cf 568 enum ib_qp_attr_mask req_param[IB_QPT_MAX];
dd5f03be 569 enum ib_qp_attr_mask req_param_add_eth[IB_QPT_MAX];
b42b63cf 570 enum ib_qp_attr_mask opt_param[IB_QPT_MAX];
dd5f03be 571 enum ib_qp_attr_mask opt_param_add_eth[IB_QPT_MAX];
8a51866f
RD		 572} qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
573 [IB_QPS_RESET] = {
574 [IB_QPS_RESET] = { .valid = 1 },
8a51866f
RD		 575 [IB_QPS_INIT] = {
576 .valid = 1,
577 .req_param = {
578 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
579 IB_QP_PORT |
580 IB_QP_QKEY),
c938a616 581 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
8a51866f
RD		 582 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
583 IB_QP_PORT |
584 IB_QP_ACCESS_FLAGS),
585 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
586 IB_QP_PORT |
587 IB_QP_ACCESS_FLAGS),
b42b63cf
SH		 588 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
589 IB_QP_PORT |
590 IB_QP_ACCESS_FLAGS),
591 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
592 IB_QP_PORT |
593 IB_QP_ACCESS_FLAGS),
8a51866f
RD		 594 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
595 IB_QP_QKEY),
596 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
597 IB_QP_QKEY),
598 }
599 },
600 },
601 [IB_QPS_INIT] = {
602 [IB_QPS_RESET] = { .valid = 1 },
603 [IB_QPS_ERR] = { .valid = 1 },
604 [IB_QPS_INIT] = {
605 .valid = 1,
606 .opt_param = {
607 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
608 IB_QP_PORT |
609 IB_QP_QKEY),
610 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
611 IB_QP_PORT |
612 IB_QP_ACCESS_FLAGS),
613 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
614 IB_QP_PORT |
615 IB_QP_ACCESS_FLAGS),
b42b63cf
SH		 616 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
617 IB_QP_PORT |
618 IB_QP_ACCESS_FLAGS),
619 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
620 IB_QP_PORT |
621 IB_QP_ACCESS_FLAGS),
8a51866f
RD		 622 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
623 IB_QP_QKEY),
624 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
625 IB_QP_QKEY),
626 }
627 },
628 [IB_QPS_RTR] = {
629 .valid = 1,
630 .req_param = {
631 [IB_QPT_UC] = (IB_QP_AV |
632 IB_QP_PATH_MTU |
633 IB_QP_DEST_QPN |
634 IB_QP_RQ_PSN),
635 [IB_QPT_RC] = (IB_QP_AV |
636 IB_QP_PATH_MTU |
637 IB_QP_DEST_QPN |
638 IB_QP_RQ_PSN |
639 IB_QP_MAX_DEST_RD_ATOMIC |
640 IB_QP_MIN_RNR_TIMER),
b42b63cf
SH		 641 [IB_QPT_XRC_INI] = (IB_QP_AV |
642 IB_QP_PATH_MTU |
643 IB_QP_DEST_QPN |
644 IB_QP_RQ_PSN),
645 [IB_QPT_XRC_TGT] = (IB_QP_AV |
646 IB_QP_PATH_MTU |
647 IB_QP_DEST_QPN |
648 IB_QP_RQ_PSN |
649 IB_QP_MAX_DEST_RD_ATOMIC |
650 IB_QP_MIN_RNR_TIMER),
8a51866f 651 },
dd5f03be
MB		 652 .req_param_add_eth = {
653 [IB_QPT_RC] = (IB_QP_SMAC),
654 [IB_QPT_UC] = (IB_QP_SMAC),
655 [IB_QPT_XRC_INI] = (IB_QP_SMAC),
656 [IB_QPT_XRC_TGT] = (IB_QP_SMAC)
657 },
8a51866f
RD		 658 .opt_param = {
659 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
660 IB_QP_QKEY),
661 [IB_QPT_UC] = (IB_QP_ALT_PATH |
662 IB_QP_ACCESS_FLAGS |
663 IB_QP_PKEY_INDEX),
664 [IB_QPT_RC] = (IB_QP_ALT_PATH |
665 IB_QP_ACCESS_FLAGS |
666 IB_QP_PKEY_INDEX),
b42b63cf
SH		 667 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |
668 IB_QP_ACCESS_FLAGS |
669 IB_QP_PKEY_INDEX),
670 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |
671 IB_QP_ACCESS_FLAGS |
672 IB_QP_PKEY_INDEX),
8a51866f
RD		 673 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
674 IB_QP_QKEY),
675 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
676 IB_QP_QKEY),
dd5f03be
MB		 677 },
678 .opt_param_add_eth = {
679 [IB_QPT_RC] = (IB_QP_ALT_SMAC |
680 IB_QP_VID |
681 IB_QP_ALT_VID),
682 [IB_QPT_UC] = (IB_QP_ALT_SMAC |
683 IB_QP_VID |
684 IB_QP_ALT_VID),
685 [IB_QPT_XRC_INI] = (IB_QP_ALT_SMAC |
686 IB_QP_VID |
687 IB_QP_ALT_VID),
688 [IB_QPT_XRC_TGT] = (IB_QP_ALT_SMAC |
689 IB_QP_VID |
690 IB_QP_ALT_VID)
691 }
8a51866f
RD		 692 }
693 },
694 [IB_QPS_RTR] = {
695 [IB_QPS_RESET] = { .valid = 1 },
696 [IB_QPS_ERR] = { .valid = 1 },
697 [IB_QPS_RTS] = {
698 .valid = 1,
699 .req_param = {
700 [IB_QPT_UD] = IB_QP_SQ_PSN,
701 [IB_QPT_UC] = IB_QP_SQ_PSN,
702 [IB_QPT_RC] = (IB_QP_TIMEOUT |
703 IB_QP_RETRY_CNT |
704 IB_QP_RNR_RETRY |
705 IB_QP_SQ_PSN |
706 IB_QP_MAX_QP_RD_ATOMIC),
b42b63cf
SH		 707 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |
708 IB_QP_RETRY_CNT |
709 IB_QP_RNR_RETRY |
710 IB_QP_SQ_PSN |
711 IB_QP_MAX_QP_RD_ATOMIC),
712 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |
713 IB_QP_SQ_PSN),
8a51866f
RD		 714 [IB_QPT_SMI] = IB_QP_SQ_PSN,
715 [IB_QPT_GSI] = IB_QP_SQ_PSN,
716 },
717 .opt_param = {
718 [IB_QPT_UD] = (IB_QP_CUR_STATE |
719 IB_QP_QKEY),
720 [IB_QPT_UC] = (IB_QP_CUR_STATE |
721 IB_QP_ALT_PATH |
722 IB_QP_ACCESS_FLAGS |
723 IB_QP_PATH_MIG_STATE),
724 [IB_QPT_RC] = (IB_QP_CUR_STATE |
725 IB_QP_ALT_PATH |
726 IB_QP_ACCESS_FLAGS |
727 IB_QP_MIN_RNR_TIMER |
728 IB_QP_PATH_MIG_STATE),
b42b63cf
SH		 729 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
730 IB_QP_ALT_PATH |
731 IB_QP_ACCESS_FLAGS |
732 IB_QP_PATH_MIG_STATE),
733 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
734 IB_QP_ALT_PATH |
735 IB_QP_ACCESS_FLAGS |
736 IB_QP_MIN_RNR_TIMER |
737 IB_QP_PATH_MIG_STATE),
8a51866f
RD		 738 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
739 IB_QP_QKEY),
740 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
741 IB_QP_QKEY),
742 }
743 }
744 },
745 [IB_QPS_RTS] = {
746 [IB_QPS_RESET] = { .valid = 1 },
747 [IB_QPS_ERR] = { .valid = 1 },
748 [IB_QPS_RTS] = {
749 .valid = 1,
750 .opt_param = {
751 [IB_QPT_UD] = (IB_QP_CUR_STATE |
752 IB_QP_QKEY),
4546d31d
DB		 753 [IB_QPT_UC] = (IB_QP_CUR_STATE |
754 IB_QP_ACCESS_FLAGS |
8a51866f
RD		 755 IB_QP_ALT_PATH |
756 IB_QP_PATH_MIG_STATE),
4546d31d
DB		 757 [IB_QPT_RC] = (IB_QP_CUR_STATE |
758 IB_QP_ACCESS_FLAGS |
8a51866f
RD		 759 IB_QP_ALT_PATH |
760 IB_QP_PATH_MIG_STATE |
761 IB_QP_MIN_RNR_TIMER),
b42b63cf
SH		 762 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
763 IB_QP_ACCESS_FLAGS |
764 IB_QP_ALT_PATH |
765 IB_QP_PATH_MIG_STATE),
766 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
767 IB_QP_ACCESS_FLAGS |
768 IB_QP_ALT_PATH |
769 IB_QP_PATH_MIG_STATE |
770 IB_QP_MIN_RNR_TIMER),
8a51866f
RD		 771 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
772 IB_QP_QKEY),
773 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
774 IB_QP_QKEY),
775 }
776 },
777 [IB_QPS_SQD] = {
778 .valid = 1,
779 .opt_param = {
780 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
781 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
782 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
b42b63cf
SH		 783 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
784 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
8a51866f
RD		 785 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
786 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
787 }
788 },
789 },
790 [IB_QPS_SQD] = {
791 [IB_QPS_RESET] = { .valid = 1 },
792 [IB_QPS_ERR] = { .valid = 1 },
793 [IB_QPS_RTS] = {
794 .valid = 1,
795 .opt_param = {
796 [IB_QPT_UD] = (IB_QP_CUR_STATE |
797 IB_QP_QKEY),
798 [IB_QPT_UC] = (IB_QP_CUR_STATE |
799 IB_QP_ALT_PATH |
800 IB_QP_ACCESS_FLAGS |
801 IB_QP_PATH_MIG_STATE),
802 [IB_QPT_RC] = (IB_QP_CUR_STATE |
803 IB_QP_ALT_PATH |
804 IB_QP_ACCESS_FLAGS |
805 IB_QP_MIN_RNR_TIMER |
806 IB_QP_PATH_MIG_STATE),
b42b63cf
SH		 807 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
808 IB_QP_ALT_PATH |
809 IB_QP_ACCESS_FLAGS |
810 IB_QP_PATH_MIG_STATE),
811 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
812 IB_QP_ALT_PATH |
813 IB_QP_ACCESS_FLAGS |
814 IB_QP_MIN_RNR_TIMER |
815 IB_QP_PATH_MIG_STATE),
8a51866f
RD		 816 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
817 IB_QP_QKEY),
818 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
819 IB_QP_QKEY),
820 }
821 },
822 [IB_QPS_SQD] = {
823 .valid = 1,
824 .opt_param = {
825 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
826 IB_QP_QKEY),
827 [IB_QPT_UC] = (IB_QP_AV |
8a51866f
RD		 828 IB_QP_ALT_PATH |
829 IB_QP_ACCESS_FLAGS |
830 IB_QP_PKEY_INDEX |
831 IB_QP_PATH_MIG_STATE),
832 [IB_QPT_RC] = (IB_QP_PORT |
833 IB_QP_AV |
834 IB_QP_TIMEOUT |
835 IB_QP_RETRY_CNT |
836 IB_QP_RNR_RETRY |
837 IB_QP_MAX_QP_RD_ATOMIC |
838 IB_QP_MAX_DEST_RD_ATOMIC |
8a51866f
RD		 839 IB_QP_ALT_PATH |
840 IB_QP_ACCESS_FLAGS |
841 IB_QP_PKEY_INDEX |
842 IB_QP_MIN_RNR_TIMER |
843 IB_QP_PATH_MIG_STATE),
b42b63cf
SH		 844 [IB_QPT_XRC_INI] = (IB_QP_PORT |
845 IB_QP_AV |
846 IB_QP_TIMEOUT |
847 IB_QP_RETRY_CNT |
848 IB_QP_RNR_RETRY |
849 IB_QP_MAX_QP_RD_ATOMIC |
850 IB_QP_ALT_PATH |
851 IB_QP_ACCESS_FLAGS |
852 IB_QP_PKEY_INDEX |
853 IB_QP_PATH_MIG_STATE),
854 [IB_QPT_XRC_TGT] = (IB_QP_PORT |
855 IB_QP_AV |
856 IB_QP_TIMEOUT |
857 IB_QP_MAX_DEST_RD_ATOMIC |
858 IB_QP_ALT_PATH |
859 IB_QP_ACCESS_FLAGS |
860 IB_QP_PKEY_INDEX |
861 IB_QP_MIN_RNR_TIMER |
862 IB_QP_PATH_MIG_STATE),
8a51866f
RD		 863 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
864 IB_QP_QKEY),
865 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
866 IB_QP_QKEY),
867 }
868 }
869 },
870 [IB_QPS_SQE] = {
871 [IB_QPS_RESET] = { .valid = 1 },
872 [IB_QPS_ERR] = { .valid = 1 },
873 [IB_QPS_RTS] = {
874 .valid = 1,
875 .opt_param = {
876 [IB_QPT_UD] = (IB_QP_CUR_STATE |
877 IB_QP_QKEY),
878 [IB_QPT_UC] = (IB_QP_CUR_STATE |
879 IB_QP_ACCESS_FLAGS),
880 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
881 IB_QP_QKEY),
882 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
883 IB_QP_QKEY),
884 }
885 }
886 },
887 [IB_QPS_ERR] = {
888 [IB_QPS_RESET] = { .valid = 1 },
889 [IB_QPS_ERR] = { .valid = 1 }
890 }
891};
892
893int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
dd5f03be
MB		 894 enum ib_qp_type type, enum ib_qp_attr_mask mask,
895 enum rdma_link_layer ll)
8a51866f
RD		 896{
897 enum ib_qp_attr_mask req_param, opt_param;
898
899 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
900 next_state < 0 || next_state > IB_QPS_ERR)
901 return 0;
902
903 if (mask & IB_QP_CUR_STATE &&
904 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
905 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
906 return 0;
907
908 if (!qp_state_table[cur_state][next_state].valid)
909 return 0;
910
911 req_param = qp_state_table[cur_state][next_state].req_param[type];
912 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
913
dd5f03be
MB		 914 if (ll == IB_LINK_LAYER_ETHERNET) {
915 req_param |= qp_state_table[cur_state][next_state].
916 req_param_add_eth[type];
917 opt_param |= qp_state_table[cur_state][next_state].
918 opt_param_add_eth[type];
919 }
920
8a51866f
RD		 921 if ((mask & req_param) != req_param)
922 return 0;
923
924 if (mask & ~(req_param | opt_param | IB_QP_STATE))
925 return 0;
926
927 return 1;
928}
929EXPORT_SYMBOL(ib_modify_qp_is_ok);
930
ed4c54e5
OG		 931int ib_resolve_eth_l2_attrs(struct ib_qp *qp,
932 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
933{
934 int ret = 0;
935 union ib_gid sgid;
936
937 if ((*qp_attr_mask & IB_QP_AV) &&
227128fc 938 (rdma_cap_eth_ah(qp->device, qp_attr->ah_attr.port_num))) {
ed4c54e5
OG		 939 ret = ib_query_gid(qp->device, qp_attr->ah_attr.port_num,
940 qp_attr->ah_attr.grh.sgid_index, &sgid);
941 if (ret)
942 goto out;
943 if (rdma_link_local_addr((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw)) {
944 rdma_get_ll_mac((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw, qp_attr->ah_attr.dmac);
945 rdma_get_ll_mac((struct in6_addr *)sgid.raw, qp_attr->smac);
c1bd6cde
MS		 946 if (!(*qp_attr_mask & IB_QP_VID))
947 qp_attr->vlan_id = rdma_get_vlan_id(&sgid);
ed4c54e5
OG		 948 } else {
949 ret = rdma_addr_find_dmac_by_grh(&sgid, &qp_attr->ah_attr.grh.dgid,
950 qp_attr->ah_attr.dmac, &qp_attr->vlan_id);
951 if (ret)
952 goto out;
953 ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr->smac, NULL);
954 if (ret)
955 goto out;
956 }
957 *qp_attr_mask |= IB_QP_SMAC;
958 if (qp_attr->vlan_id < 0xFFFF)
959 *qp_attr_mask |= IB_QP_VID;
960 }
961out:
962 return ret;
963}
964EXPORT_SYMBOL(ib_resolve_eth_l2_attrs);
965
966
1da177e4
LT		 967int ib_modify_qp(struct ib_qp *qp,
968 struct ib_qp_attr *qp_attr,
969 int qp_attr_mask)
970{
ed4c54e5
OG		 971 int ret;
972
973 ret = ib_resolve_eth_l2_attrs(qp, qp_attr, &qp_attr_mask);
974 if (ret)
975 return ret;
976
0e0ec7e0 977 return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
1da177e4
LT		 978}
979EXPORT_SYMBOL(ib_modify_qp);
980
981int ib_query_qp(struct ib_qp *qp,
982 struct ib_qp_attr *qp_attr,
983 int qp_attr_mask,
984 struct ib_qp_init_attr *qp_init_attr)
985{
986 return qp->device->query_qp ?
0e0ec7e0 987 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
1da177e4
LT		 988 -ENOSYS;
989}
990EXPORT_SYMBOL(ib_query_qp);
991
0e0ec7e0
SH		 992int ib_close_qp(struct ib_qp *qp)
993{
994 struct ib_qp *real_qp;
995 unsigned long flags;
996
997 real_qp = qp->real_qp;
998 if (real_qp == qp)
999 return -EINVAL;
1000
1001 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
1002 list_del(&qp->open_list);
1003 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
1004
1005 atomic_dec(&real_qp->usecnt);
1006 kfree(qp);
1007
1008 return 0;
1009}
1010EXPORT_SYMBOL(ib_close_qp);
1011
1012static int __ib_destroy_shared_qp(struct ib_qp *qp)
1013{
1014 struct ib_xrcd *xrcd;
1015 struct ib_qp *real_qp;
1016 int ret;
1017
1018 real_qp = qp->real_qp;
1019 xrcd = real_qp->xrcd;
1020
1021 mutex_lock(&xrcd->tgt_qp_mutex);
1022 ib_close_qp(qp);
1023 if (atomic_read(&real_qp->usecnt) == 0)
1024 list_del(&real_qp->xrcd_list);
1025 else
1026 real_qp = NULL;
1027 mutex_unlock(&xrcd->tgt_qp_mutex);
1028
1029 if (real_qp) {
1030 ret = ib_destroy_qp(real_qp);
1031 if (!ret)
1032 atomic_dec(&xrcd->usecnt);
1033 else
1034 __ib_insert_xrcd_qp(xrcd, real_qp);
1035 }
1036
1037 return 0;
1038}
1039
1da177e4
LT		 1040int ib_destroy_qp(struct ib_qp *qp)
1041{
1042 struct ib_pd *pd;
1043 struct ib_cq *scq, *rcq;
1044 struct ib_srq *srq;
1045 int ret;
1046
0e0ec7e0
SH		 1047 if (atomic_read(&qp->usecnt))
1048 return -EBUSY;
1049
1050 if (qp->real_qp != qp)
1051 return __ib_destroy_shared_qp(qp);
1052
b42b63cf
SH		 1053 pd = qp->pd;
1054 scq = qp->send_cq;
1055 rcq = qp->recv_cq;
1056 srq = qp->srq;
1da177e4
LT		 1057
1058 ret = qp->device->destroy_qp(qp);
1059 if (!ret) {
b42b63cf
SH		 1060 if (pd)
1061 atomic_dec(&pd->usecnt);
1062 if (scq)
1063 atomic_dec(&scq->usecnt);
1064 if (rcq)
1065 atomic_dec(&rcq->usecnt);
1da177e4
LT		 1066 if (srq)
1067 atomic_dec(&srq->usecnt);
1068 }
1069
1070 return ret;
1071}
1072EXPORT_SYMBOL(ib_destroy_qp);
1073
1074/* Completion queues */
1075
1076struct ib_cq *ib_create_cq(struct ib_device *device,
1077 ib_comp_handler comp_handler,
1078 void (*event_handler)(struct ib_event *, void *),
8e37210b
MB		 1079 void *cq_context,
1080 const struct ib_cq_init_attr *cq_attr)
1da177e4
LT		 1081{
1082 struct ib_cq *cq;
1083
8e37210b 1084 cq = device->create_cq(device, cq_attr, NULL, NULL);
1da177e4
LT		 1085
1086 if (!IS_ERR(cq)) {
1087 cq->device = device;
b5e81bf5 1088 cq->uobject = NULL;
1da177e4
LT		 1089 cq->comp_handler = comp_handler;
1090 cq->event_handler = event_handler;
1091 cq->cq_context = cq_context;
1092 atomic_set(&cq->usecnt, 0);
1093 }
1094
1095 return cq;
1096}
1097EXPORT_SYMBOL(ib_create_cq);
1098
2dd57162
EC		 1099int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
1100{
1101 return cq->device->modify_cq ?
1102 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
1103}
1104EXPORT_SYMBOL(ib_modify_cq);
1105
1da177e4
LT		 1106int ib_destroy_cq(struct ib_cq *cq)
1107{
1108 if (atomic_read(&cq->usecnt))
1109 return -EBUSY;
1110
1111 return cq->device->destroy_cq(cq);
1112}
1113EXPORT_SYMBOL(ib_destroy_cq);
1114
a74cd4af 1115int ib_resize_cq(struct ib_cq *cq, int cqe)
1da177e4 1116{
40de2e54 1117 return cq->device->resize_cq ?
33b9b3ee 1118 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
1da177e4
LT		 1119}
1120EXPORT_SYMBOL(ib_resize_cq);
1121
1122/* Memory regions */
1123
1124struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
1125{
1126 struct ib_mr *mr;
1c636f80
EC		 1127 int err;
1128
1129 err = ib_check_mr_access(mr_access_flags);
1130 if (err)
1131 return ERR_PTR(err);
1da177e4
LT		 1132
1133 mr = pd->device->get_dma_mr(pd, mr_access_flags);
1134
1135 if (!IS_ERR(mr)) {
b5e81bf5
RD		 1136 mr->device = pd->device;
1137 mr->pd = pd;
1138 mr->uobject = NULL;
1da177e4
LT		 1139 atomic_inc(&pd->usecnt);
1140 atomic_set(&mr->usecnt, 0);
1141 }
1142
1143 return mr;
1144}
1145EXPORT_SYMBOL(ib_get_dma_mr);
1146
1147struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
1148 struct ib_phys_buf *phys_buf_array,
1149 int num_phys_buf,
1150 int mr_access_flags,
1151 u64 *iova_start)
1152{
1153 struct ib_mr *mr;
1c636f80
EC		 1154 int err;
1155
1156 err = ib_check_mr_access(mr_access_flags);
1157 if (err)
1158 return ERR_PTR(err);
1da177e4 1159
7ce5eacb
DB		 1160 if (!pd->device->reg_phys_mr)
1161 return ERR_PTR(-ENOSYS);
1162
1da177e4
LT		 1163 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
1164 mr_access_flags, iova_start);
1165
1166 if (!IS_ERR(mr)) {
b5e81bf5
RD		 1167 mr->device = pd->device;
1168 mr->pd = pd;
1169 mr->uobject = NULL;
1da177e4
LT		 1170 atomic_inc(&pd->usecnt);
1171 atomic_set(&mr->usecnt, 0);
1172 }
1173
1174 return mr;
1175}
1176EXPORT_SYMBOL(ib_reg_phys_mr);
1177
1178int ib_rereg_phys_mr(struct ib_mr *mr,
1179 int mr_rereg_mask,
1180 struct ib_pd *pd,
1181 struct ib_phys_buf *phys_buf_array,
1182 int num_phys_buf,
1183 int mr_access_flags,
1184 u64 *iova_start)
1185{
1186 struct ib_pd *old_pd;
1187 int ret;
1188
1c636f80
EC		 1189 ret = ib_check_mr_access(mr_access_flags);
1190 if (ret)
1191 return ret;
1192
1da177e4
LT		 1193 if (!mr->device->rereg_phys_mr)
1194 return -ENOSYS;
1195
1196 if (atomic_read(&mr->usecnt))
1197 return -EBUSY;
1198
1199 old_pd = mr->pd;
1200
1201 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
1202 phys_buf_array, num_phys_buf,
1203 mr_access_flags, iova_start);
1204
1205 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
1206 atomic_dec(&old_pd->usecnt);
1207 atomic_inc(&pd->usecnt);
1208 }
1209
1210 return ret;
1211}
1212EXPORT_SYMBOL(ib_rereg_phys_mr);
1213
1214int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
1215{
1216 return mr->device->query_mr ?
1217 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
1218}
1219EXPORT_SYMBOL(ib_query_mr);
1220
1221int ib_dereg_mr(struct ib_mr *mr)
1222{
1223 struct ib_pd *pd;
1224 int ret;
1225
1226 if (atomic_read(&mr->usecnt))
1227 return -EBUSY;
1228
1229 pd = mr->pd;
1230 ret = mr->device->dereg_mr(mr);
1231 if (!ret)
1232 atomic_dec(&pd->usecnt);
1233
1234 return ret;
1235}
1236EXPORT_SYMBOL(ib_dereg_mr);
1237
9bee178b
SG		 1238/**
1239 * ib_alloc_mr() - Allocates a memory region
1240 * @pd: protection domain associated with the region
1241 * @mr_type: memory region type
1242 * @max_num_sg: maximum sg entries available for registration.
1243 *
1244 * Notes:
1245 * Memory registeration page/sg lists must not exceed max_num_sg.
1246 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed
1247 * max_num_sg * used_page_size.
1248 *
1249 */
1250struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
1251 enum ib_mr_type mr_type,
1252 u32 max_num_sg)
17cd3a2d
SG		 1253{
1254 struct ib_mr *mr;
1255
9bee178b
SG		 1256 if (pd->device->alloc_mr) {
1257 mr = pd->device->alloc_mr(pd, mr_type, max_num_sg);
1258 } else {
1259 if (mr_type != IB_MR_TYPE_MEM_REG ||
1260 !pd->device->alloc_fast_reg_mr)
1261 return ERR_PTR(-ENOSYS);
1262 mr = pd->device->alloc_fast_reg_mr(pd, max_num_sg);
1263 }
17cd3a2d
SG		 1264
1265 if (!IS_ERR(mr)) {
1266 mr->device = pd->device;
1267 mr->pd = pd;
1268 mr->uobject = NULL;
1269 atomic_inc(&pd->usecnt);
1270 atomic_set(&mr->usecnt, 0);
1271 }
1272
1273 return mr;
1274}
9bee178b 1275EXPORT_SYMBOL(ib_alloc_mr);
17cd3a2d 1276
00f7ec36
SW		 1277struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len)
1278{
1279 struct ib_mr *mr;
1280
1281 if (!pd->device->alloc_fast_reg_mr)
1282 return ERR_PTR(-ENOSYS);
1283
1284 mr = pd->device->alloc_fast_reg_mr(pd, max_page_list_len);
1285
1286 if (!IS_ERR(mr)) {
1287 mr->device = pd->device;
1288 mr->pd = pd;
1289 mr->uobject = NULL;
1290 atomic_inc(&pd->usecnt);
1291 atomic_set(&mr->usecnt, 0);
1292 }
1293
1294 return mr;
1295}
1296EXPORT_SYMBOL(ib_alloc_fast_reg_mr);
1297
1298struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device,
1299 int max_page_list_len)
1300{
1301 struct ib_fast_reg_page_list *page_list;
1302
1303 if (!device->alloc_fast_reg_page_list)
1304 return ERR_PTR(-ENOSYS);
1305
1306 page_list = device->alloc_fast_reg_page_list(device, max_page_list_len);
1307
1308 if (!IS_ERR(page_list)) {
1309 page_list->device = device;
1310 page_list->max_page_list_len = max_page_list_len;
1311 }
1312
1313 return page_list;
1314}
1315EXPORT_SYMBOL(ib_alloc_fast_reg_page_list);
1316
1317void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
1318{
1319 page_list->device->free_fast_reg_page_list(page_list);
1320}
1321EXPORT_SYMBOL(ib_free_fast_reg_page_list);
1322
1da177e4
LT		 1323/* Memory windows */
1324
7083e42e 1325struct ib_mw *ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type)
1da177e4
LT		 1326{
1327 struct ib_mw *mw;
1328
1329 if (!pd->device->alloc_mw)
1330 return ERR_PTR(-ENOSYS);
1331
7083e42e 1332 mw = pd->device->alloc_mw(pd, type);
1da177e4 1333 if (!IS_ERR(mw)) {
b5e81bf5
RD		 1334 mw->device = pd->device;
1335 mw->pd = pd;
1336 mw->uobject = NULL;
7083e42e 1337 mw->type = type;
1da177e4
LT		 1338 atomic_inc(&pd->usecnt);
1339 }
1340
1341 return mw;
1342}
1343EXPORT_SYMBOL(ib_alloc_mw);
1344
1345int ib_dealloc_mw(struct ib_mw *mw)
1346{
1347 struct ib_pd *pd;
1348 int ret;
1349
1350 pd = mw->pd;
1351 ret = mw->device->dealloc_mw(mw);
1352 if (!ret)
1353 atomic_dec(&pd->usecnt);
1354
1355 return ret;
1356}
1357EXPORT_SYMBOL(ib_dealloc_mw);
1358
1359/* "Fast" memory regions */
1360
1361struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1362 int mr_access_flags,
1363 struct ib_fmr_attr *fmr_attr)
1364{
1365 struct ib_fmr *fmr;
1366
1367 if (!pd->device->alloc_fmr)
1368 return ERR_PTR(-ENOSYS);
1369
1370 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
1371 if (!IS_ERR(fmr)) {
1372 fmr->device = pd->device;
1373 fmr->pd = pd;
1374 atomic_inc(&pd->usecnt);
1375 }
1376
1377 return fmr;
1378}
1379EXPORT_SYMBOL(ib_alloc_fmr);
1380
1381int ib_unmap_fmr(struct list_head *fmr_list)
1382{
1383 struct ib_fmr *fmr;
1384
1385 if (list_empty(fmr_list))
1386 return 0;
1387
1388 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
1389 return fmr->device->unmap_fmr(fmr_list);
1390}
1391EXPORT_SYMBOL(ib_unmap_fmr);
1392
1393int ib_dealloc_fmr(struct ib_fmr *fmr)
1394{
1395 struct ib_pd *pd;
1396 int ret;
1397
1398 pd = fmr->pd;
1399 ret = fmr->device->dealloc_fmr(fmr);
1400 if (!ret)
1401 atomic_dec(&pd->usecnt);
1402
1403 return ret;
1404}
1405EXPORT_SYMBOL(ib_dealloc_fmr);
1406
1407/* Multicast groups */
1408
1409int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1410{
c3bccbfb
OG		 1411 int ret;
1412
0c33aeed
JM		 1413 if (!qp->device->attach_mcast)
1414 return -ENOSYS;
1415 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1416 return -EINVAL;
1417
c3bccbfb
OG		 1418 ret = qp->device->attach_mcast(qp, gid, lid);
1419 if (!ret)
1420 atomic_inc(&qp->usecnt);
1421 return ret;
1da177e4
LT		 1422}
1423EXPORT_SYMBOL(ib_attach_mcast);
1424
1425int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1426{
c3bccbfb
OG		 1427 int ret;
1428
0c33aeed
JM		 1429 if (!qp->device->detach_mcast)
1430 return -ENOSYS;
1431 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1432 return -EINVAL;
1433
c3bccbfb
OG		 1434 ret = qp->device->detach_mcast(qp, gid, lid);
1435 if (!ret)
1436 atomic_dec(&qp->usecnt);
1437 return ret;
1da177e4
LT		 1438}
1439EXPORT_SYMBOL(ib_detach_mcast);
59991f94
SH		 1440
1441struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
1442{
1443 struct ib_xrcd *xrcd;
1444
1445 if (!device->alloc_xrcd)
1446 return ERR_PTR(-ENOSYS);
1447
1448 xrcd = device->alloc_xrcd(device, NULL, NULL);
1449 if (!IS_ERR(xrcd)) {
1450 xrcd->device = device;
53d0bd1e 1451 xrcd->inode = NULL;
59991f94 1452 atomic_set(&xrcd->usecnt, 0);
d3d72d90
SH		 1453 mutex_init(&xrcd->tgt_qp_mutex);
1454 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
59991f94
SH		 1455 }
1456
1457 return xrcd;
1458}
1459EXPORT_SYMBOL(ib_alloc_xrcd);
1460
1461int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1462{
d3d72d90
SH		 1463 struct ib_qp *qp;
1464 int ret;
1465
59991f94
SH		 1466 if (atomic_read(&xrcd->usecnt))
1467 return -EBUSY;
1468
d3d72d90
SH		 1469 while (!list_empty(&xrcd->tgt_qp_list)) {
1470 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
1471 ret = ib_destroy_qp(qp);
1472 if (ret)
1473 return ret;
1474 }
1475
59991f94
SH		 1476 return xrcd->device->dealloc_xrcd(xrcd);
1477}
1478EXPORT_SYMBOL(ib_dealloc_xrcd);
319a441d
HHZ		 1479
1480struct ib_flow *ib_create_flow(struct ib_qp *qp,
1481 struct ib_flow_attr *flow_attr,
1482 int domain)
1483{
1484 struct ib_flow *flow_id;
1485 if (!qp->device->create_flow)
1486 return ERR_PTR(-ENOSYS);
1487
1488 flow_id = qp->device->create_flow(qp, flow_attr, domain);
1489 if (!IS_ERR(flow_id))
1490 atomic_inc(&qp->usecnt);
1491 return flow_id;
1492}
1493EXPORT_SYMBOL(ib_create_flow);
1494
1495int ib_destroy_flow(struct ib_flow *flow_id)
1496{
1497 int err;
1498 struct ib_qp *qp = flow_id->qp;
1499
1500 err = qp->device->destroy_flow(flow_id);
1501 if (!err)
1502 atomic_dec(&qp->usecnt);
1503 return err;
1504}
1505EXPORT_SYMBOL(ib_destroy_flow);
1b01d335
SG		 1506
1507int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
1508 struct ib_mr_status *mr_status)
1509{
1510 return mr->device->check_mr_status ?
1511 mr->device->check_mr_status(mr, check_mask, mr_status) : -ENOSYS;
1512}
1513EXPORT_SYMBOL(ib_check_mr_status);
Linux kernel - Deliverables
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